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Line level signal strength is significantly higher than mic level, which is a fundamental aspect in audio systems. The distinction between these two levels is crucial for proper audio signal processing and compatibility between devices.

Mic level refers to the signal produced by microphones, which is quite weak, typically around -60 to -40 dBV. This low strength requires preamplification to boost the signal to a usable level for further processing, such as mixing or amplification in speakers.

Conversely, line level signals range from -10 dBV for consumer equipment to +4 dBu for professional equipment, making them much stronger than mic level signals. This higher strength allows line level signals to be sent over longer distances without significant degradation or loss of quality.

Understanding this difference ensures that audio equipment is connected correctly, preventing issues such as noise, distortion, or inadequate volume that could arise from improperly matched levels.